Rotary table clamp structure of multi-station rotary table machine

Abstract

The invention relates to a multi-station turntable machine, and discloses a turntable clamp structure of a multi-station turntable machine, which comprises a mounting part, a mounting shaft, a mounting disc, a plurality of groups of clamps and a plurality of stepping motors. After the workpiece enters the next station, all the air cylinders move, all the pressing strips are switched from the fixed state to the loosened state, and the limiting block is switched from the limiting state to the released state; and the workpieces machined in all the stations return to the first station and are taken out, and new workpieces are placed on the first station. Judging whether the position of the pressing strip for pressing the workpiece at the previous station is the same as the position of the pressing strip for pressing the workpiece at the current station or not at all stations; if so, keeping the limiting block and the stepping motor still; if not, the limiting block is matched with the connecting sleeve, the stepping motor rotates by a corresponding angle, and the position of the pressing strip pressing the workpiece is adjusted. The clamp has the beneficial effects that the position of a workpiece pressed by the clamp can be quickly and conveniently adjusted, so that the clamp can better adapt to different workpieces and different stations.

Description

Technical Field

[0001] The present invention relates to a multi-station rotary machine, and particularly to a rotary fixture structure of a multi-station rotary machine. Background Art

[0002] A multi-station rotary machine generally includes: a rotary fixture structure, a cam divider, and a processing device for processing with multiple stations. The multi-station rotary machine is used in occasions of multiple consecutive processing steps, and each station corresponds to one step. The rotary fixture structure is used to fix the workpiece and drive the workpiece to rotate. Multiple groups of fixtures are installed on the mounting plate of the rotary fixture structure, and the number of fixtures is equal to the number of stations. The cam divider drives the mounting plate to rotate. Each time it rotates, the angle corresponds to the angle between adjacent two stations. All workpieces enter the next station in sequence. The fixture generally includes: a placement table for placing the workpiece, a pressing strip for pressing the workpiece downward, and a cylinder for controlling the pressing strip to press / loosen. The processing of each station is different, and the processing positions corresponding to the workpiece may be the same or different, while the position where the pressing strip presses the workpiece is fixed. Therefore, for each type of workpiece, a position for pressing the workpiece needs to be found, and this position will not affect the processing at all stations (for example, it will not block the position to be processed and will not interfere with the processing equipment, etc.). Adjust the position of the limit block on the placement table or adjust the positions of structures such as the pressing strip and the cylinder so that the position where the pressing strip presses the workpiece is the one found before. The existing problems of the rotary fixture structure are as follows: When the fixture adapts to different workpieces and different stations, the operation is relatively cumbersome and inconvenient. Summary of the Invention

[0003] The present application provides a rotary fixture structure of a multi-station rotary machine, which can solve the problems raised in the background art.

[0004] In the present application, a rotary fixture structure of a multi-station rotary machine is provided, including: a mounting part; a mounting shaft rotatably connected to the mounting part around a vertical axis; a mounting plate fixedly connected to the position of the mounting shaft above the mounting part; having multiple mounting positions around the mounting shaft, and each mounting position has a limit hole with a toothed inner wall; multiple groups of fixtures respectively installed at the multiple mounting positions of the mounting plate; one group of fixtures includes: a placement table fixedly connected to the mounting plate, a frame rotatably connected to the placement table around a vertical axis, a limit block that telescopically moves up and down at the bottom of the frame and has a toothed outer wall, a pressing strip for pressing / loosening the workpiece, and a cylinder installed on the frame; wherein, the cylinder is a double-acting cylinder, the upper end of the piston rod is connected to the pressing strip, and the lower end is connected to the limit block; when the pressing strip is in a fixed state of pressing the workpiece, the limit block is in a limit state of entering the limit hole to limit the rotation of the frame; when the pressing strip is in a loosening state of loosening the workpiece, the limit block is in a release state of leaving the limit hole to allow the frame to rotate; Multiple stepping motors, all connected to the mounting part; one-to-one corresponding to multiple limit blocks, and a connecting sleeve matching the limit block is fixedly provided on the output shaft; Among them, there is a relative up-and-down movement between the stepping motor and the limit block, which is used to enable the connecting sleeve to be sleeved onto the limit block in the released state.

[0005] In some embodiments, the connection between the stepping motor and the mounting part is a fixed connection; the limit block in the limiting state is retracted into the frame body, and the limit block in the released state is extended out of the frame body, and the limit block extends out of the frame body and enters the connecting sleeve.

[0006] In some embodiments, the mounting shaft is hollow, the side wall has multiple groups of hole positions corresponding to multiple cylinders one by one, the top has a first rotary joint, and the bottom has a second rotary joint; a group of hole positions includes: a first connection hole connected to the first air hole of the cylinder and a second connection hole connected to the second air hole of the cylinder; all the first connection holes are connected to the first rotary joint, and all the second connection holes are connected to the second rotary joint.

[0007] In some embodiments, there is a partition in the cavity of the mounting shaft, and the partition divides the cavity into an upper part and a lower part; all the first connection holes are connected to the upper part of the cavity, and all the second connection holes are connected to the lower part of the cavity.

[0008] In some embodiments, a connecting rod is hinged at the middle position of the pressing strip, and the lower end of the connecting rod is hinged at the top of the frame body; the connection between the piston rod and the pressing strip is a hinge connection.

[0009] In some embodiments, when the pressing strip is in the fixed state, the connecting rod is vertical and the pressing strip is horizontal; the pressing strip is threadedly connected with a pressing block for pressing the workpiece.

[0010] In some embodiments, the pressing strip includes: a first section for connecting the piston rod of the cylinder and a second section telescopically connected to the first section and used for pressing the workpiece.

[0011] In summary, in the present application, a turntable fixture structure of a multi-station turntable machine includes: a mounting part, a mounting shaft, a mounting disc, multiple groups of fixtures, and multiple stepping motors. After the workpiece enters the next station, all the cylinders move, all the pressing strips switch from the fixed state to the released state, and the limit blocks switch from the limiting state to the released state; and the workpiece that has completed the processing of all stations returns to the first station and is taken out, and a new workpiece is placed at the first station. It is judged at all stations whether the position where the pressing strip presses the workpiece in the previous station is the same as the position where the pressing strip is designed to press the workpiece in this station: if it is the same, the limit block and the stepping motor remain stationary; if it is different, the limit block and the connecting sleeve are matched, and the stepping motor rotates by a corresponding angle to adjust the position where the pressing strip presses the workpiece. The beneficial effects are: it can quickly and conveniently adjust the position where the fixture presses the workpiece, enabling the fixture to better adapt to different workpieces and different stations without affecting the processing of the workpiece at the station. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background art, the drawings required for use in the embodiments of the present application or the background art will be described below.

[0013] Figure 1 It is a top view of the present application; Figure 2 It is a bottom view of the present application; Figure 3 It is a schematic diagram of the mounting plate and the fixture; Figure 4 It is a bottom view of the mounting plate and the fixture; Figure 5 It is Figure 4 an enlarged schematic view of part A in Figure 6 It is a front view of the fixture; Figure 7 It is Figure 6 a cross-sectional view along A-A in Figure 8 It is a schematic diagram of the mounting shaft and the mounting part; Figure 9 It is a cross-sectional view of the mounting shaft and the mounting part; Figure 10 It is a schematic diagram of some other embodiments of the fixture.

[0014] In the figure, 1. Mounting part; 2. Mounting shaft; 2a. Hole position; 2a1. First connection hole; 2a2. Second connection hole; 2b. First rotary joint; 2c. Second rotary joint; 2d. Partition; 3. Mounting plate; 3a. Limit hole; 4. Fixture; 41. Placing table; 411. Base; 412. Support block; 413. First limit stop; 414. Second limit stop; 42. Frame body; 421. Shaft body; 422. Block body; 43. Limit block; 43a. Insertion strip; 44. Pressing strip; 44a. Link rod; 44b. Insertion block; 44c. Pressing block; 441. First section; 442. Second section; 4d. Fastener; 45. Cylinder; 5. Stepper motor; 5a. Connecting sleeve; 4345. Connecting bar. DETAILED EMBODIMENTS

[0015] The following further explanations are made in conjunction with the attached drawings. The attached drawings are only examples and are not drawn strictly to scale. Unless otherwise defined, the technical terms or scientific terms used in this disclosure should have the ordinary meaning understood by those of ordinary skill in the field to which this disclosure belongs. The "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. In the case of no conflict, the embodiments in this application can be combined with each other.

[0016] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 8 , a turntable fixture structure of a multi-station turntable machine, comprising: a mounting part 1, a mounting shaft 2, a mounting disc 3, multiple groups of fixtures 4, and multiple stepping motors 5.

[0017] The mounting part 1 is used to mount the turntable fixture structure on the equipment frame of the multi-station turntable machine.

[0018] Please refer to Figure 1 、 Figure 8 and Figure 9 . The mounting shaft 2 is rotatably connected to the mounting part 1 about the vertical axis. More specifically, a bearing is provided between the lower end of the mounting shaft 2 and the mounting part 1.

[0019] Please refer to Figure 1 、 Figure 3 and Figure 8 , the mounting disc 3 is fixedly connected to the mounting shaft 2, and the fixed connection position is above the mounting part 1, so that the mounting disc 3 is also above the mounting part 1. More specifically, a flange for the mounting disc 3 to be fixedly connected is welded and fixed to the outer wall of the mounting shaft 2.

[0020] Please refer to Figure 1 、 Figure 4 and Figure 5 , the mounting disc 3 has multiple mounting positions, and these mounting positions are evenly circularly arranged around the mounting shaft 2. Each mounting position has a limiting hole 3a with a toothed inner wall. More specifically, the limiting hole 3a is a stepped through hole, with a smaller upper part aperture and a larger lower part aperture and a ring block fixedly connected. The inner wall of the ring block is toothed.

[0021] Multiple sets of jigs 4 are respectively installed at multiple installation positions on the mounting plate 3. That is, the number of jigs 4 is the same as the number of installation positions, which also corresponds to the number of workstations of the multi-station turntable machine. In the attached drawings, five workstations are taken as an example.

[0022] Please refer to Figure 6 and Figure 7 , one set of jig 4 includes: a placement table 41, a frame body 42, a limit block 43, a pressing strip 44, and a cylinder 45.

[0023] The placement table 41 is fixedly connected to the mounting plate 3. The placement table 41 is used for placing workpieces. After the workpieces are placed, the rotational freedom and horizontal movement freedom of the workpieces are restricted. The placement table 41 may include: a base 411, a support block 412 for supporting the workpiece, two first limit stoppers 413 for restricting the workpiece, and two second limit stoppers 414.

[0024] The frame body 42 is rotatably connected to the base 411 of the placement table 41 around the vertical axis. More specifically, the frame body 42 has a vertical shaft body 421, and both ends of the shaft body 421 are stepped; the base 411 is composed of a bottom plate, two side plates, and a top plate fixedly connected by bolts. Through holes are provided in both the bottom plate and the top plate, and a bushing for rotatably connecting the shaft body 421 is clamped and fixed in the through holes.

[0025] The limit block 43 is telescopically connected to the bottom of the frame body 42. The connection position is more specifically the bottom end of the shaft body 421. That is, there is only up-and-down movement freedom between the limit block 43 and the frame body 42. More specifically, the shaft body 421 is hollow, and the cross-section of the cavity is a regular polygon. A plugging strip 43a inserted into the cavity of the shaft body 421 is fixedly connected to the top of the limit block 43. The cross-section of the plugging strip 43a matches the cavity of the shaft body 421 to restrict the relative rotation between the two. The outer wall of the limit block 43 is serrated. That is, the limit block 43 is matched with the limit hole 3a of the mounting plate 3. Through the expansion and contraction of the limit block 43, the limit block 43 can enter / leave the limit hole 3a. When the two cooperate, the rotation of the frame body 42 relative to the placement table 41 is restricted. When the two are separated, the rotation of the frame body 42 relative to the placement table 41 is allowed.

[0026] The pressing strip 44 is used to press / loosen the workpiece.

[0027] The cylinder 45 is installed on the frame body 42. That is, in addition to the above-mentioned shaft body 421, the frame body 42 also has a block 422 for fixedly connecting the cylinder block of the cylinder 45. The upper end of the piston rod of the cylinder 45 is connected to the pressing strip 44. That is, the cylinder 45 is used to drive the pressing strip 44 to press / loosen the workpiece on the placement table 41. When the pressing strip 44 is in a fixed state of pressing the workpiece, the last remaining up-and-down movement freedom of the workpiece is restricted.

[0028] In some embodiments, the connection between the piston rod of the cylinder 45 and the pressure bar 44 may be a fixed connection.

[0029] See also Figure 7 In some embodiments, a connecting rod 44a is hinged at the middle of the pressure strip 44, and the lower end of the connecting rod 44a is hinged to the top of the frame 42. The hinged position is more specifically the top of the shaft body 421. The top of the shaft body 421 can be fixedly connected with a plug-in block 44b, a part of which is inserted into the cavity of the shaft body 421, and the other part is hinged for the connecting rod 44a. The connection between the piston rod and the pressure strip 44 is hinged.

[0030] When the piston rod of the cylinder 45 is extended, the pressure strip 44 tends to press the workpiece, and when the piston rod of the cylinder 45 is retracted, the pressure strip 44 tends to release the workpiece. Compared with the fixed connection between the piston rod of the cylinder 45 and the pressure strip 44, the workpiece can be pressed more stably.

[0031] See also Figure 7 In some embodiments, based on the above-mentioned "hinged connection between the piston rod of the cylinder 45 and the pressure strip 44", when the pressure strip 44 is in a fixed state, the connecting rod 44a is vertical and the pressure strip 44 is horizontal. In this state, the effect of pressing the workpiece is best. Correspondingly, the pressure strip 44 is threadedly connected with a pressure block 44c for pressing the workpiece, that is, the top of the pressure block 44c has a stud, and the pressure strip 44 has a threaded hole for the stud to be threaded. By rotating the stud, the pressure block 44c is driven to adjust the fixed position relative to the pressure strip 44 up and down, ensuring that in the state of "the connecting rod 44a is vertical and the pressure strip 44 is horizontal", the pressure block 44c can resist the workpiece.

[0032] The lower end of the piston rod of the cylinder 45 is connected to the limit block 43, that is, the limit block 43 is driven to extend and retract by the cylinder 45. Combined with the pressure strip 44: the pressure strip 44 is in a fixed state of pressing the workpiece, and the limit block 43 is in a limited state of entering the limit hole 3a to limit the rotation of the frame 42; the pressure strip 44 is in a released state of releasing the workpiece, and the limit block 43 is in a released state of leaving the limit hole 3a to allow the frame 42 to rotate.

[0033] The cylinders 45 of the multiple groups of clamps 4 are used to press / release the workpieces together. These cylinders 45 are used as actuators and are equipped with a group of air compressors, three-position four-way reversing valves, and air circuits, so that these cylinders 45 can extend, retract, or stay at corresponding positions.

[0034] See also Figure 8, in some embodiments, the mounting shaft 2 is hollow, and its side wall has multiple groups of hole positions 2a, and the multiple groups of hole positions 2a correspond to the multiple cylinders 45 one by one. One group of hole positions 2a includes: a first connection hole 2a1 and a second connection hole 2a2, that is, the cylinder 45 is a double-acting cylinder 45, and the cylinder body has a first air hole and a second air hole, and one of them intakes air while the other exhausts air. The first air hole and the first connection hole 2a1 are connected by an air pipe, and the second air hole and the second connection hole 2a2 are connected by an air pipe. The top of the mounting shaft 2 has a first rotary joint 2b, and the bottom has a second rotary joint 2c. More specifically, it can be: both ends of the mounting shaft 2 are open and fixedly connected with cover plates, and the cover plates have hole positions 2a communicating with the cavity of the mounting shaft 2, and the first rotary joint 2b / the second rotary joint 2c is threadedly connected to the hole position 2a. All the first connection holes 2a1 are connected to the first rotary joint 2b, and all the second connection holes 2a2 are connected to the second rotary joint 2c.

[0035] The mounting shaft 2 is used to form a part of the air circuit, and by using the first rotary joint 2b and the second rotary joint 2c, the air circuit does not interfere with the rotation of the mounting shaft 2.

[0036] In some embodiments, between all the first connection holes 2a1 and the first rotary joint 2b, and between all the second connection holes 2a2 and the second rotary joint 2c, a tee, a cross, and an air pipe can be used for connection.

[0037] Please refer to Figure 8 and Figure 9 , in some embodiments, a partition 2d is provided in the cavity of the mounting shaft 2, and the partition 2d divides the cavity into an upper part and a lower part. All the first connection holes 2a1 are connected to the upper part of the cavity, and all the second connection holes 2a2 are connected to the lower part of the cavity.

[0038] Compared with the connection method using a tee, a cross, and an air pipe, the structure is simpler, the assembly is more convenient, and it can better achieve the connection between all the first connection holes 2a1 and the first rotary joint 2b, and the connection between all the second connection holes 2a2 and the second rotary joint 2c.

[0039] Please refer to Figure 2 and Figure 8 , multiple stepping motors 5 are all connected to the mounting part 1. The multiple stepping motors 5 correspond to the multiple limit blocks 43 one by one. A connecting sleeve 5a matching the limit block 43 is fixedly provided on the output shaft of the stepping motor 5, that is, the inner wall of the connecting sleeve 5a is serrated.

[0040] There is a relative up-and-down movement between the stepping motor 5 and the limit block 43. Through this up-and-down movement, the connecting sleeve 5a can be sleeved onto the limit block 43 in the released state. That is, when the limit block 43 is in the released state, after the limit block 43 and the connecting sleeve 5a are matched, the stepping motor 5 can drive the limit block 43, the frame body 42, the pressing strip 44, the air cylinder 45, etc. to rotate integrally, and adjust the position where the pressing strip 44 presses the workpiece.

[0041] The workpieces pass through all workstations in sequence to complete processing. For different workpieces, the first limit stop 413 and the second limit stop 414 of the placement table 41 are replaced, adjusted in position, etc. to adapt to the workpieces. According to the processing at each workstation, the position where the clamping strip presses the workpiece is designed so that the clamping strip does not interfere with the processing.

[0042] S1. After each workstation performs corresponding processing on the workpiece, the cam divider of the multi-station rotary table drives the mounting plate 3 to rotate a corresponding angle. Each time it rotates, all the workpieces and the fixtures 4 enter the next workstation in sequence.

[0043] S2. After the workpiece enters the next workstation, all the air cylinders 45 move, all the pressing strips 44 switch from the fixed state to the released state, and the limit block 43 switches from the limiting state to the released state; while the workpiece that has completed processing at all workstations returns to the first workstation and is taken out from the fixture, and a new workpiece is placed on the fixture at the first workstation.

[0044] S3. At all workstations, it is judged whether the position where the pressing strip 44 presses the workpiece in the previous workstation is the same as the position designed to press the workpiece in this workstation: If they are the same, the limit block 43 and the stepping motor 5 remain stationary; if they are different, the limit block 43 and the connecting sleeve 5a are matched, and the stepping motor 5 rotates a corresponding angle to adjust the position where the pressing strip 44 presses the workpiece.

[0045] S4. All the air cylinders 45 move, all the pressing strips 44 switch back from the released state to the fixed state, and the limit block 43 switches back from the released state to the limiting state; each workstation performs corresponding processing on the workpiece.

[0046] S5. Repeat the above S1 - S4.

[0047] Correspondingly, the stepping motor 5 is selected according to the number of teeth of the limit block 43, and the step angle is equal to the angle corresponding to adjacent two teeth.

[0048] In addition, in step S3, the fixture 4 at the first workstation can also: the limit block 43 and the connecting sleeve 5a are matched, and the stepping motor 5 rotates a corresponding angle to stagger the pressing strip 44 and the workpiece, making it more convenient for the material taking device to take out the workpiece that has completed processing at all workstations and for the material placing device to place a new workpiece on the fixture at the first workstation. In some embodiments, a power source can be designed to drive the stepper motor 5 to move up and down. When the limit block 43 switches from the limited state to the released state, the stepper motor 5 moves upward, so that the limit block 43 and the connecting sleeve 5a are matched.

[0049] Please refer to Figure 7 and Figure 8 , in some embodiments, the connection between the stepper motor 5 and the mounting portion 1 is a fixed connection. The limit block 43 in the limited state is retracted into the frame body 42, and the limit block 43 in the released state extends out of the frame body 42. The limit block 43 extends out of the frame body 42 and enters the connecting sleeve 5a. When the limit block 43 switches from the limited state to the released state, the limit block 43 extends downward, and at the same time, it can enter the connecting sleeve 5a to complete the matching of the limit block 43 and the connecting sleeve 5a.

[0050] Combined with the above embodiment of "the piston rod of the air cylinder 45 and the pressure strip 44 are hinged", all the pressure strips 44 switch from the fixed state to the released state, and the lower end of the piston rod of the air cylinder 45 correspondingly extends downward. When the limit block 43 switches from the limited state to the released state, the limit block 43 extends downward. That is, the lower end of the piston rod and the limit block 43 move in the same direction, and the connection between the two can be: a connecting strip 4345 is provided to connect the two. The structure is more concise, and a tension spring can also be provided between the insertion section of the limit block 43 and the insertion block 44b. The tension spring keeps the limit block 43 retracted into the frame body 42, and the air cylinder 45 can overcome the tension spring and drive the limit block 43 to extend downward.

[0051] Please refer to Figure 10 , in some embodiments, the pressure strip 44 includes: a first section 441 and a second section 442 for pressing the workpiece. The first section 441 is used for connecting the piston rod of the air cylinder 45. If it is the above embodiment of "the piston rod of the air cylinder 45 and the pressure strip 44 are hinged", the first section 441 is also used for hinging the connecting rod 44a. The second section 442 is telescopically connected to the first section 441 to adjust the fixed connection position on the first section 441. More specifically, the first section 441 is in a stepped shape, the second section 442 is sleeved into the smaller part of the first section 441, and the port where the second section 442 is sleeved has a gap. Both sides of the gap have integral connecting ears, and a fastener 4d is passed through between the two connecting ears The second section 442 adjusts the fixed connection position of the second section 442 on the first section 441, and can also adjust the position where the pressure strip 44 presses the workpiece, so as to better adapt to different workpieces and different work positions.

Claims

1. A rotary fixture structure of a multi-station rotary machine, characterized in that, Comprising: Mounting part (1); Mounting shaft (2), rotatably connected to the mounting part (1) about a vertical axis; Mounting disc (3), fixedly connected to the mounting shaft (2) at a position above the mounting part (1); having multiple mounting positions around the mounting shaft (2), each mounting position having a limiting hole (3a) with a toothed inner wall; Multiple groups of clamps (4), respectively mounted at the multiple mounting positions of the mounting disc (3); one group of clamps (4) includes: a placing table (41) fixedly connected to the mounting disc (3), a frame body (42) rotatably connected to the placing table (41) about a vertical axis, a limiting block (43) telescopically moving up and down at the bottom of the frame body (42) and having a toothed outer wall, a pressing strip (44) for pressing / loosening the workpiece, and a cylinder (45) mounted on the frame body (42); Wherein, the cylinder (45) is double-acting, the upper end of the piston rod is connected to the pressing strip (44), and the lower end is connected to the limiting block (43); the pressing strip (44) is in a fixed state of pressing the workpiece, and the limiting block (43) is in a limiting state of entering the limiting hole (3a) to limit the rotation of the frame body (42); the pressing strip (44) is in a loosening state of loosening the workpiece, and the limiting block (43) is in a released state of leaving the limiting hole (3a) to allow the rotation of the frame body (42); Multiple stepping motors (5), all connected to the mounting part (1); corresponding to the multiple limiting blocks (43) one by one, a connecting sleeve (5a) matching the limiting block (43) is fixedly provided on the output shaft; Wherein, there is a relative up-and-down movement between the stepping motor (5) and the limiting block (43) for enabling the connecting sleeve (5a) to be sleeved on the limiting block (43) in the released state.

2. The rotary fixture structure of a multi-station rotary machine according to claim 1, characterized in that, The connection between the stepping motor (5) and the mounting part (1) is a fixed connection; the limiting block (43) in the limiting state is retracted into the frame body (42), the limiting block (43) in the released state is extended out of the frame body (42), and the limiting block (43) extends out of the frame body (42) and enters the connecting sleeve (5a).

3. The rotary fixture structure of a multi-station rotary machine according to claim 1, characterized in that, The mounting shaft (2) is hollow, the side wall has multiple groups of hole positions (2a) corresponding to the multiple cylinders (45) one by one, the top has a first rotary joint (2b), and the bottom has a second rotary joint (2c); one group of hole positions (2a) includes: a first connection hole (2a1) connected to the first air hole of the cylinder (45), and a second connection hole (2a2) connected to the second air hole of the cylinder (45); all the first connection holes (2a1) are connected to the first rotary joint (2b), and all the second connection holes (2a2) are connected to the second rotary joint (2c).

4. The rotary fixture structure of a multi-station rotary table machine according to claim 3, characterized in that, A partition plate (2d) is provided in the cavity of the mounting shaft (2), and the partition plate (2d) divides the cavity into an upper part and a lower part; all the first connection holes (2a1) are connected to the upper part of the cavity, and all the second connection holes (2a2) are connected to the lower part of the cavity.

5. The turntable fixture structure of a multi-station turntable machine according to claim 1, characterized in that A connecting rod (44a) is hinged at the middle position of the pressing strip (44), and the lower end of the connecting rod (44a) is hinged to the top of the frame body (42); the connection between the piston rod and the pressing strip (44) is a hinge connection.

6. The turntable fixture structure of a multi-station turntable machine according to claim 5, characterized in that When the pressing strip (44) is in the fixed state, the connecting rod (44a) is vertical and the pressing strip (44) is horizontal; the pressing strip (44) is threadedly connected with a pressing block (44c) for pressing the workpiece.

7. The rotary fixture structure of a multi-station rotary table machine according to claim 1, characterized in that, The press strip (44) includes: a first section (441) for connecting to the piston rod of the cylinder (45), and a second section (442) telescopically connected to the first section (441) and used for pressing the workpiece.

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